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btrfs: sysfs: validate scrub_speed_max value 

The value set as scrub_speed_max accepts size with suffixes
(k/m/g/t/p/e) but we should still validate it for trailing characters,
similar to what we do with chunk_size_store.

CC: stable@vger.kernel.org # 5.15+
Signed-off-by: David Disseldorp <ddiss@suse.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Disseldorp 2023-12-08 11:41:56 +11:00 committed by David Sterba
parent 6140ba8a0a
commit 2b0122aaa8
1 changed files with 4 additions and 0 deletions
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4
fs/btrfs/sysfs.c
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@ -1783,6 +1783,10 @@ static ssize_t btrfs_devinfo_scrub_speed_max_store(struct kobject *kobj,
unsigned long long limit;
limit = memparse(buf, &endptr);
/* There could be trailing '\n', also catch any typos after the value. */
endptr = skip_spaces(endptr);
if (*endptr != 0)
return -EINVAL;
WRITE_ONCE(device->scrub_speed_max, limit);
return len;
}